Lead to Longer Life/' author Roni Caryn Rabin reported:

Being overweight won't kill you—it may even help you live (ofiger.. That's the latest from a study that analyzed data on 11,326 Canadian adults, ages 25 and older, who were followed over a 12-year period. The report... found that overall, people who were overweight but not obese—defined as a body mass index of 25 to 29.9—were actually less likely to die than people of normal weight, defined as a B.M.I. of 18.5 to 24.9.

Question

1, Although this article doesn't describe an experiment, it does imply that being a little overweight may lead to a longer hfe. Identify at least one confounding variable that may compromise the validity of this inference. Support your case.

Choose the study design that best fits the following description: A study was conducted to determine if the incidence of noise-induced hearing loss was greater in registered dental hygienists who used ultrasonic scaling devices for cumulative periods of time longer than two hours per day as compared to registered dental hygienists who used these devices for less than two hours daily or not at all. Annual amount of time using the scaling devices was ascertained at the start of the study. All of the participants were then contacted every year for a hearing exam.

a) Ecologic Study

b) Randomized Clinical Trial

) Prospective Cohort Study

d) Retrospective Cohort Study

e) Case Control Study

f) Cross Sectional Study

In Millikan’s oil-drop experiment, one looks at a small oil drop held motionless between two plates. Take the voltage between the plates to be 2033 V, and the plate separation to be 2.00 cm. The oil drop (of density 0.81 g/cm³) has a diameter of 2.9 x 10^-6m. Find the charge on the drop, in terms of electron units. You need to round your answer to the nearest integer.

QUESTION:

Add code so that if no parameter values are specified for method “main”, then the error message “file name expected” is printed out instead of the "Opening file " message. Hint: If no parameter values are specified for method “main”, then the length of the array “args” will be zero. If that error message “file name expected” is printed out, the program should stop. You can make any Java program stop using this line …

• System.exit(0);

skeleton code:

/**
* This is a simple program for the first lab, to familiarise students
* with the lab and with plate.
*
* @author Raymond Lister
* @version March 2015
*/
public class Assignment
{
public static void main(String[] args)
{
  
// DO NOT CHANGE THIS LINE OR ANYTHING ABOVE THIS LINE
String[] list = {"Hello.txt"};
System.out.println("Opening file "+ list[0]);

// DO NOT CHANGE THIS LINE OR ANYTHING BELOW THIS LINE
}
}

Consider that you are an author who is writing a contemporary realistic fiction book.

What would the topic of your book be?

Is there a specific age group you are targeting? Consider this, it is difficult to write a book appropriate for children age 5 that also appeals to teens.

What content would you be sure to include? Why?

Why are you writing on this topic?

Are there other books on this same topic? If so, please name them.

Are there any activities you would include for children/young adults to engage in?

Are there ethical or moral societal codes that you have to consider when writing this book?

5. Name a form of radiation that has a long wavelength.

6. Name a form of radiation that has a short wavelength.

7. Why do leaves appear green?

8. Describe Englemann’s experiment with bacteria, algae and light.

9. Describe how a solution of chlorophyll will fluoresce.

10. Describe the difference between photosystem I and photosystem II.

11. Where does the oxygen by-product that is produced during photosynthesis come from?

12. Describe what happens during chemiosmosis.

Problem 4 – Fun with Vacuum Physics

To do surface physics, we need to put the entire experiment into an ultra high vacuum so the air does not contaminate the surface. To heat the metal sample, we use an electron gun. A 500 V power supply has the positive lead connected to the metal sample, and the negative connected to a filament that emits electrons. The electrons boil off of the filament at 0 V, and are attracted to the sample at 500 V.

a) What is the kinetic energy in Joules of one electron when it hits the sample?

K = _______________ (This is called 500 eV of energy)

b) How many electrons per second must hit the sample to provide 1 W of heating power?

c)To prepare the sample for the experiment, we need to start by removing the top 5 atomic layers from the sample, since they have been contaminated with molecules from the trace amount of gas in the vacuum. To do this, we ionize helium atoms and then accelerate them using the same device as the electron gun, but switching the positive and negative leads, since the ion is 4He+. Find the kinetic energy, momentum, and velocity of a singly charged helium atom when it has been accelerated through 500 V

K = _______________ p = _______________ v = _______________

d) Since the helium ion is so much bigger than the electron, instead of getting absorbed into the metal and heating it, it collides with the surface, and about 40% of the time it knocks off one atom from the surface. Assuming that the surface of the sample is 2 cm2 in area, the atoms are arranged in a square pattern with a distance of m between nearest neighbors, and it takes 6 minutes to remove the top 5 atomic layers, how many ions per second must be hitting the sample?

= _______________

While this may seem like a big number, it is tiny compared to Avagadro's number, which is important since we will need to pump out of our vacuum chamber every atom of gas that we add!

Thank you.

How would you employ longitudinal data on fecundity, health and longevity in a large cohort of humans to test the antagonistic pleiotropy hypothesis of senescence? Specify your hypothesis and how you would test it in 200 words or less

1. UC Inc. has predicted unlevered free cash flows (FCF) of $19,800, $21,540, $25,300, and $28,900 for the next 4 years. Find the average growth rate using the predicted values. Then, assuming the growth rate persists forever at this rate, find the present value of the terminal value. Finally, find the total enterprise value. The discount rate is 18%.

1. Consider Consumers A, B, and C with the following preferences over two goods.

U_A (x₁,x₂) = x₁²x₂³

U_B (x₁,x₂) = 2x₁+3x₂

U_C (x₁,x₂) = min{2x₁,3x₂)

The prices given are p1, p2 and income for each consumer is m.

Solve for the Engel curves for each consumer.

please be very detailed, thank you!